JPS5667467A - File system - Google Patents

File system

Info

Publication number
JPS5667467A
JPS5667467A JP14251679A JP14251679A JPS5667467A JP S5667467 A JPS5667467 A JP S5667467A JP 14251679 A JP14251679 A JP 14251679A JP 14251679 A JP14251679 A JP 14251679A JP S5667467 A JPS5667467 A JP S5667467A
Authority
JP
Japan
Prior art keywords
circuit
processor
informs
contents
file
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14251679A
Other languages
Japanese (ja)
Inventor
Hisao Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14251679A priority Critical patent/JPS5667467A/en
Publication of JPS5667467A publication Critical patent/JPS5667467A/en
Pending legal-status Critical Current

Links

Landscapes

  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

PURPOSE: To enable a processing system occupying a file device to attain access from a random route in a system where processing systems share the same file device, by providing bits in the file device.
CONSTITUTION: When processor 11 sends an access request to file controller 21, the access request is sent to command execution control circuit 212 via change-over circuit 211 unless controller 21 is in process of performing processing from another processor. Circuit 212 outputs a reserve request to reserve control circuit 312 in file device 31. On the other hand, decoder circuit 215 decodes the contents of protective information memory circuit 311 in device 31 and, when its contents are not the prescribed specific value, informs circuit 212 of that. Further, comparing circuit 214 compares information sent from processor 11 and stored in comparison information memory circuit 213 with the contents of circuit 311 and, when the both disagree, informs circuit 212 of that. Circuit 212 informs processor 11 that device 31 is in the access inhibition state and then releases device 31 through circuit 312.
COPYRIGHT: (C)1981,JPO&Japio
JP14251679A 1979-11-02 1979-11-02 File system Pending JPS5667467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14251679A JPS5667467A (en) 1979-11-02 1979-11-02 File system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14251679A JPS5667467A (en) 1979-11-02 1979-11-02 File system

Publications (1)

Publication Number Publication Date
JPS5667467A true JPS5667467A (en) 1981-06-06

Family

ID=15317166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14251679A Pending JPS5667467A (en) 1979-11-02 1979-11-02 File system

Country Status (1)

Country Link
JP (1) JPS5667467A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62274448A (en) * 1986-05-23 1987-11-28 Hitachi Ltd Control system for input/output device
JPH02161513A (en) * 1988-08-26 1990-06-21 Oki Electric Ind Co Ltd Double access controller for magnetic disk device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4843848A (en) * 1971-10-06 1973-06-25
JPS52144236A (en) * 1976-05-26 1977-12-01 Hitachi Ltd Information processing system
JPS52155924A (en) * 1976-06-21 1977-12-24 Hitachi Ltd Data file control unit
JPS539434A (en) * 1976-07-14 1978-01-27 Hitachi Ltd Data processor system
JPS5627461A (en) * 1979-08-13 1981-03-17 Hitachi Ltd File share control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4843848A (en) * 1971-10-06 1973-06-25
JPS52144236A (en) * 1976-05-26 1977-12-01 Hitachi Ltd Information processing system
JPS52155924A (en) * 1976-06-21 1977-12-24 Hitachi Ltd Data file control unit
JPS539434A (en) * 1976-07-14 1978-01-27 Hitachi Ltd Data processor system
JPS5627461A (en) * 1979-08-13 1981-03-17 Hitachi Ltd File share control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62274448A (en) * 1986-05-23 1987-11-28 Hitachi Ltd Control system for input/output device
JPH02161513A (en) * 1988-08-26 1990-06-21 Oki Electric Ind Co Ltd Double access controller for magnetic disk device

Similar Documents

Publication Publication Date Title
JPS56140452A (en) Memory protection system
MY121544A (en) Execution of data processing instructions.
CA2011388A1 (en) Interrupt controller for multiprocessor systems
JPS5220735A (en) Microprogram controlled computer system
JPS51121230A (en) A control memory system
JPS5299034A (en) Control system for micro program
JPS51141537A (en) Memory access control device
JPS5667467A (en) File system
JPS5757370A (en) Access control system
JPS5326632A (en) Common memory control unit
JPS5259537A (en) Data processor
JPS5627461A (en) File share control system
JPS5534316A (en) Store buffer control system
JPS559228A (en) Memory request control system
JPS5715298A (en) Storage protection system for common memory
JPS53105139A (en) Dynamic main memory controller
JPS526032A (en) Main storage control unit
JPS5475231A (en) Buffer memory control system
JPS51127637A (en) Information processing device under micro program control system
JPS5696353A (en) Multiprocessor control device
JPS52149039A (en) Buffer invalid control system
JPS55115156A (en) Information processing system
JPS5362939A (en) Common information control system
JPS6448164A (en) Processing end interrupt control system
JPS55157178A (en) Information processing unit